How about this for a modelling challenge?
Spotted on a visit to the Custard Factory in Birmingham, these Northlight ex-factory buildings have been decorated with serious arty graffiti.
Scratchbuilding the building sides wouldn't be difficult, although that chimney would be "interesting", but painting? I think I might have to pass. Maybe I could make transfers from photos?
Whether you like this sort of art or not, you have to admit, it is colourfull...